I was trying some of the solutions published in this forum for the same problem, but just one in particular work for me: add the line of code in the file alsa-base.conf. This just works for a few days, now the problem is back again.
Any solution to fix this problem for good?
Compaq Presario CQ40
$ lspci | grep -i audio
00:14.2 Audio device: ATI Technologies Inc SBx00 Azalia (Intel HDA)
01:05.1 Audio device: ATI Technologies Inc RS780 Azalia controller
But in the past I've tried to update alsa drivers without being able to solve the problem.
__-- http://askubuntu.com/questions/32956/headphones-phones-dont-work-on-my-toshiba-satellite-l655d-s5066-laptop
– Joel Lino Jun 21 '11 at 22:23